Dear,

Percentile Score shows the percentage of candidates who have scored equal to or below a particular percentile in an exam. It is the normalized score and not the raw scores. After normalization, each topper of a session will get the same percentile of 100 which is the desirable one. Also the marks between the lowest and highest scores are also converted to the respective percentiles. So say for example you have a 99 percentile, only 1% students have scored more than you. Basically joSAA gives ranking based on your percentile. Student with 99.1 percentile will have a greater ranking than one with 99 percentile. If 2 students have same percentile then their marks in different subjects are compared and given a ranking.

Hope this helps! Feel free to ask further queries!